文章基本信息

标题：Evaluation of linear losses in ventilation ducts with a rounded rectangle cross-section
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作者：Kazimierz Peszynski ; Václav Tesař ; Ewa Kuliś 等
期刊名称：MATEC Web of Conferences
电子版ISSN：2261-236X
出版年度：2019
卷号：302
页码：1-9
DOI：10.1051/matecconf/201930201021
语种：English
出版社：EDP Sciences
摘要：The paper presents a new ventilation system characterized by the cross-section of the channels in the shape of a rounded rectangle. The basic research problem was the determination of local losses in the system components. To achieve this goal, it is necessary to know the linear losses in the ducts. The principle of determining both types of losses was presented. The friction coefficients of linear pressure losses referred to the unit of the straight length of the duct sectionζl[m−1] as well as generalized dimensionless friction coefficient of linear pressure lossesλ[-] is presented. The main achievement of the paper is the statement that the lambda coefficientλcan replace the coefficientsζlexamined duct cross-sections.